Drug interactions
Clemastine + Dexfenfluramine
Severity: Minor
Clemastine and Dexfenfluramine: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Clemastine is sedating while dexfenfluramine is a serotonergic anorectic with variable CNS effects, so the combined effect on alertness is uncertain. Dexfenfluramine has been withdrawn in most markets, which limits relevance.
What this interaction means in plain words
Clemastine and Dexfenfluramine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Possible opposing CNS effects; no well-established interaction mechanism.
What to do
No specific adjustment is needed. Monitor the patient for drowsiness or agitation.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Clemastine and Dexfenfluramine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Clemastine
Frequently asked questions
Can I take Clemastine with Dexfenfluramine?
MediHelp rates the interaction as minor. Clemastine and Dexfenfluramine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Clemastine is sedating while dexfenfluramine is a serotonergic anorectic with variable CNS effects, so the combined effect on alertness is uncertain. Dexfenfluramine has been withdrawn in most markets, which limits relevance.
How serious is the interaction between Clemastine and Dexfenfluramine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No specific adjustment is needed. Monitor the patient for drowsiness or agitation.
What other medicines interact with Clemastine?
MediHelp also lists interactions of Clemastine with, for example, Alfentanil, Benzhydrocodone / acetaminophen, Buprenorphine buccal. The full list is on the Clemastine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
